Abstract: A spark erosion tool includes an electrode arranged on a tool longitudinal axis and an electrode holder aligned along and arranged on the axis and connected to the electrode. The electrode holder includes a moving device for moving the electrode relative to the electrode holder and includes a press for applying pressure transversely to the axis in the area of an imaginary hose extending in the axis. The electrode holder has a cross section corresponding essentially to the electrode. An electrode for a spark erosion tool with a cylinder surface or a spherical surface includes a groove connected to a bore. A deflecting bore can be produced in a drill string part using the spark erosion tool. The deflecting bore is curved and connects two straight flushing bores.

Abstract: The invention relates to a method for calibrating sensors, in particular RFID sensors, within an enclosure such as, e.g., a sterilization chamber. It furthermore relates to a sensor calibrated by the method of the invention, a disposable device including such a sensor, as well as a treatment device.

Abstract: A spark erosion tool (101, 102) is defined which comprises an electrode (301, 302) arranged on a tool longitudinal axis (2) and an electrode holder (401 . . . 417) aligned along the tool longitudinal axis (2) and arranged on the latter and connected to the electrode (301, 302). The electrode holder (401 . . . 417) comprises means for moving the electrode (301, 302) relative to the electrode holder (401 . . . 417) and means (6, 11, 12, 13, 15) for applying pressure acting transversely to the tool longitudinal axis (2) in the area of an imaginary hose (7) extending in the tool longitudinal axis (2), which has a cross section corresponding essentially to the electrode (301, 302). Furthermore, a method is defined of how the spark erosion tool (101, 102) can be used. In addition, an electrode (302) is defined for a spark erosion tool with a cylinder surface or a spherical surface, in which at least one groove (35) connected to a bore (36) is arranged.

Abstract: The invention relates to a method for calibrating sensors, in particular RFID sensors, within an enclosure such as, e.g., a sterilization chamber. It furthermore relates to a sensor calibrated by the method of the invention, a disposable device including such a sensor, as well as a treatment device.

Abstract: The invention relates to a drill (4) and a device or a method for drilling boreholes in workpieces (3), in which a periodically acting radial force (19) is exerted on the drill head (5) of the drill (4). The drill head (5) of the drill (4) has a cutting edge (52) extending only over a part of the diameter D (51) and is designed to have a lateral, V-shaped chip removing groove or bead (59) and with a channel (12) with an outlet opening (56) in the drill head (5) for supplying a drill fluid (9). On a drill side (61) of the drill head (5) opposite the bead (59) between a first and a second cylinder casing partial surface (64, 65) of the drill head (5) a rear offset (63) is formed which reduces the cross section of the drill head (5) in relation to an enclosing cylinder casing surface (61) of the drill head (5).

Abstract: This invention relates to the field of signal transit time sensors, in particular sensors based on ultrasonic transit times. Existing electronic control circuits for such transit time sensors for measurements on medical liquids, in particular blood, are extremely complex or their time resolution is limited. However, the present invention makes use of a simple measurement technique which cannot be used directly at first for the time resolution to be achieved. In this method, an ordinary sampling method is used to detect the received signal (12). An oscillator-like received signal (12) generated by an emitted step-like signal is first sampled during a half-period (14, 15) and is checked with the help of a selection criterion.

Abstract: This invention relates to the field of signal transit time sensors, in particular sensors based on ultrasonic transit times. Existing electronic control circuits for such transit time sensors for measurements on medical liquids, in particular blood, are extremely complex or their time resolution is limited. However, the present invention makes use of a simple measurement technique which cannot be used directly at first for the time resolution to be achieved. In this method, an ordinary sampling method is used to detect the received signal (12). An oscillator-like received signal (12) generated by an emitted step-like signal is first sampled during a half-period (14, 15) and is checked with the help of a selection criterion.

Abstract: The invention relates to a drill (4) and a device or a method for drilling boreholes in workpieces (3), in which a periodically acting radial force (19) is exerted on the drill head (5) of the drill (4). The drill head (5) of the drill (4) has a cutting edge (52) extending only over a part of the diameter D(51) and is designed to have a lateral, V-shaped chip removing groove or bead (59) and with a channel (12) with an outlet opening (56) in the drill head (5) for supplying a drill fluid (9). On a drill side (61) of the drill head (5) opposite the bead (59) between a first and a second cylinder casing partial surface (64, 65) of the drill head (5) a rear offset (63) is formed which reduces the cross section of the drill head (5) in relation to an enclosing cylinder casing surface (61) of the drill head (5).

Abstract: A measuring apparatus for the determination of parameters of medical fluids with a measured region which including a measuring chamber device for receiving a disposable cassette with at least one measuring chamber through which the fluid to be measured is guided, and at least one measuring element for measuring a measured value whose value depends on the extent of the measuring chamber in a measuring direction and allows the determination of the parameter, or of a value being in a fixed relationship thereto, with a known extent of the measuring chamber. A distance sensor unit is provided which is arranged relative to the measuring chamber such that the measured distance changes relative to the extent of the measuring chamber. A method is also provided for the determination of parameters of medical fluids which can be carried out with the measuring apparatus, and for the calibration of the measuring apparatus.

Abstract: A device for measuring parameters of medical fluids having a measurement chamber through which the fluid to be measured passes. The chamber is sealed on one side by a flexible membrane, and it also has a measurement plate that has a peripheral seal on its outer edge and is in contact with the flexible membrane. At least one sensor for measuring a parameter of the medical fluid is mounted on the measurement plate, and the measurement plate has a continuous inlet leading to the flexible membrane so that a vacuum can be established between the measurement plate and the flexible membrane.

Abstract: The invention relates to a measuring apparatus for the determination of parameters of medical fluids with a measured region which comprises a measuring chamber device for receiving a disposable cassette with at least one measuring chamber through which the fluid to be measured is guided and at least one measuring element for measuring a measured value whose value depends on the extent of the measuring chamber in a measuring direction and allows the determination of the parameter to be determined, or of a value being in a fixed relationship thereto, with a known extent of the measuring chamber. In accordance with the invention, a distance sensor unit is provided which is arranged relative to the to the measuring chamber such that the measured distance changes relative to the extent of the measuring chamber.

Abstract: A body fluid measurement apparatus for continually monitoring the body fluids produced by a catheterized patient is disclosed. The apparatus comprises a discharge hose in fluid communication with the patient, a housing that supports the discharge hose, a dripping chamber for temporarily holding the body fluid while temperature and electrical conductivity measurements are made, a force transducer for producing a signal representing the weight of the body fluid mass collected, a container for collecting the body fluid that is suspended from the force transducer, a storage cell power source, and a computer for processing a signal generated by the force transducer, for generating a timing signal, and for computing the patient's body fluid volume flow in a certain time interval. All computed measurements are sent to a display also located on the apparatus.

Abstract: In a measuring device for determination of the activity or the concentration of ions in solution comprising a flow channel (24) having a reference electrode and at least one measuring electrode, said flow channel having a first end (22) and a second end (23); a first line (18) connecting said first end of said flow channel to at least one calibrating liquid container (1,2,3) through first valve means (5,6,7); a first pumping means (14A) interposed in said first line (18) between said first valve means (5,6,7) and said first end (22) of said flow channel (24); a discharge line (19) connected to said first line adjacent said first end (22) of said flow channel (24), said discharge line having second pumping means (14B); a sample feed line (25) connected to said second end (23) of said flow channel for providing a sample to said flow channel; first and second sensors (10,11) arranged in said first and second ends of said flow channel, respectively, for detecting the flowing fronts of liquids, said sensors being

Abstract: There is described a method and apparatus for the determination of hematocrit levels in which both the conductivity of whole blood and the conductivity of blood plasma are determined together. While a conductivity cell (18) is being used for the determination of the conductivity of whole blood, the conductivity of plasma is calculated in a computer (30) with the aid of ion selective electrodes (14, 16) from the sodium or potassium concentrations.

Abstract: Measuring device for determination of the activity or of the concentration of ions in solutions, which has an electrode block having several electrodes and with a flow channel, the flow channel being in connection at its one end with a sample vessel and is connected at its other end to a line, in which a pump is interposed, with calibrating solution containers.Between the pump and the outlet of the electrode block branches off a discharge line, in which a further pump is interposed. Preferably, both pumps are combined into a peristaltic pump, the lines being laid in the segments of the pump.According to a second embodiment, the electrode block is again in connection with the calibrating solution containers. The delivery of the sample is performed however on the same side through a septum. Advantageously, the other side of the electrode block opens out into a pressure equalization vessel, into which a withdrawal line opens in which in turn the above mentioned peristaltic pump is interposed.

Abstract: An apparatus (1) for the drawing off of untreated and treated dialyzing liquid and/or blood from a dialysis device (1) has a dialyzer, from which a first line (22) goes off upstream and a second line (24) goes off downstream, which join into a third line (54). The third line (54) is connected to an analysis device (57). In each of the first and second lines is provided a pump (26, 28) and a shut-off element (56, 56'), between which an overflow (38, 40) per line is arranged. This on the one hand ensures that the liquid in the lines (22, 24) are kept constantly in motion, which prevents the formation of line blockages in the case of liquids tending to coagulate, and on the other hand considerably reduces the displacement time of the liquid to be investigated to the analysis device (57).